<template>
    <div class="shopcar-container">
        <!-- 商品列表区域 -->
        <div class="goods-list">
            <div class="mui-card" v-for="(item,i) in goodslist" :key="item.id">
                <div class="mui-card-content">
                    <div class="mui-card-content-inner">
                        <mt-switch 
                        v-model="$store.getters.getGoodsSelected[item.id]" 
                        @change="selectedChanged(item.id,$store.getters.getGoodsSelected[item.id])"></mt-switch>
                        <img :src="item.thumb_path" alt="">
                        <div class="info">
                            <h1>{{item.title}}</h1>
                            <p>
                                <span class="price">￥{{item.sell_price}}</span>
                                <numbox :initcount = "$store.getters.getGoodsCount[item.id]" :goodsid="item.id"></numbox>
                                <!--
                                    问题： 如何从购物车中获取商品的数量呢
                                    1.我们可以创建一个空对象，然后循环购物车中所有的商品数据，把当前循环这条商品
                                    的ID，作为对象的属性名，count值作为属性值，这样当把所有商品循环一遍，就会得到
                                    一个对象
                                    {
                                        88:1,89：1,90:7
                                    }
                                -->
                                <a class="del" @click.prevent="remove(item.id,i)">删除</a>
                            </p>
                        </div>
                    </div>
                </div>
            </div>
        </div>

        <!-- 结算区域 -->
        <div class="mui-card">
            <div class="mui-card-content">
                <div class="mui-card-content-inner jiesuan">
                    <div class="left">
                        <p>总计（不含运费）</p>
                        <p>已勾选商品<span class="red">{{$store.getters.getGoodsCountAndAmount.count}}</span>件，总价￥
                        <span class="red">{{$store.getters.getGoodsCountAndAmount.amount}}</span></p>
                    </div>
                    <mt-button type="danger">去结算</mt-button>
                </div>
            </div>
        </div>
    </div>
</template>
<script>
import numbox from '../subcomponents/shopcar-numberbox.vue'

export default {
    data() {
        return {
            goodslist:[],
            value: true,
        }
    },
    created() {
        this.getGoodsList();
    },
    methods: {
        getGoodsList (){
            //获取购物车商品列表
            /** 
             * 1.获取到 store 中 所有的商品的id,然后拼接处一个逗号分隔的字符串
             * 
            */
            var idArr = [];
            this.$store.state.car.forEach( item => idArr.push(item.id));
            // 如果购物车中没有商品，则直接返回，不需要请求数据接口，否则会报错
            if(idArr.length <= 0){
                return; 
            }
            this.$http.get('http://www.liulongbin.top:3005/api/goods/getshopcarlist/' + idArr.join(',') ).then( result => {
                if( result.body.status === 0){
                    console.log(result.body)
                    this.goodslist =  result.body.message 
                }
            })
        },
        remove(id,index){
            /*点击删除，把商品从store中删除，根据传递的id删除，同时，
            把组件中的goodslist中对应删除的那个商品使用index来删除
            */
           this.goodslist.splice(index,1)
           this.$store.commit('removeFromCar',id)
        },
        selectedChanged(id,val){
            //每当点击开关，把最新的开关状态，同步到store中
            // console.log(val)
            // console.log(1)
            this.$store.commit('updateGoodsSelected',{id,selected:val})
        }
    },
    components: {
        numbox
    }
}
</script>
<style lang="scss" scoped>
    .shopcar-container{
        background-color: #eee;
        overflow: hidden;
        .goods-list{
            .mui-card-content-inner{
                display: flex;
                align-items: center;
            }
            img{
                width:60px;
                height: 60px;
            }
            h1{
                font-size:13px;
            }
            .info{
                display: flex;
                flex-direction: column;
                justify-content: space-between;
                .price{
                    color:red;
                    font-weight: bold;
                }
                .del{
                    color:blue;
                }
            }
        }
        .jiesuan{
            display: flex;
            justify-content: space-between;
            align-items: center;
            .red{
                color:red;
                font-weight: bold;
                font-size: 16px;
            }
        }
    }
</style>

